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Automatische Übersetzung:
Transition metal solutions. Beakers with solutions of transition metal salts. Compounds containing transition metals are often coloured. Left to right: potassium permanganate (KMnO4, magenta-violet), nickel sulphate (NiSO4, green-blue), iron (III) chloride (FeCl3, brown-yellow), ammonium metavanadate (V) (NH4VO3, yellow), chromium (III) potassium sulphate (KCr (SO4)2, blue), cobalt chloride (CoCl2, rose-red), potassium dichromate (VI) (K2Cr2O7, orange-red), potassium chromate (VI) (K2CrO4, yellow), copper sulphate (CuSO4, blue).